The noun patois describes the way you talk, like the patois of New Englanders who tend to drop the letter r: "Drive yah cah to Hahvahd Yahd," while others say, "Drive your car to Harvard Yard."
Patois, which rhymes with "voilà," is speech used in a particular region, profession, or group. It is a French word that originated as "rough speech." Examples of patois are found in every region of the world, but perhaps the most famous is Jamaican. "Ah wha dat yuh ah luok pan?," is Jamaican patois for, "What’s that you’re looking at?" Patois is also the "jargon" or "lingo" used by a group, such as musicians whose patois is lost on non-musicians.